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Micrina
Taxonomy
Micrina was named by Laurie (1986) [Sepkoski's age data: Cm Atda-u Sepkoski's reference number: 923,1006]. It is not extant.
It was assigned to Mitrosagophora by Sepkoski (2002); to Tannuolinidae by Li and Xiao (2004), Holmer et al. (2008); and to Linguliformea by Holmer et al. (2011).
It was assigned to Mitrosagophora by Sepkoski (2002); to Tannuolinidae by Li and Xiao (2004), Holmer et al. (2008); and to Linguliformea by Holmer et al. (2011).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1986 | Micrina Laurie |
| 1988 | Mirabella Barskova |
| 2002 | Micrina Sepkoski |
| 2002 | Mirabella Sepkoski |
| 2004 | Micrina Li and Xiao p. 901 |
| 2008 | Micrina Holmer et al. p. 724 |
| 2011 | Micrina Holmer et al. p. 237 |
| 2023 | Mirabella Wagner p. G1441 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Micrina Laurie 1986
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†Micrina etheridgei Tate 1892
†Micrina pusilla Gravestock et al. 2001
†Micrina ridicula Barskova 1988
†Micrina xiaofanensis Li and Xiao 2004
Invalid names: Mirabella Barskova 1988 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| G. Li and S. Xiao 2004 | Micrina can be distinguished from Tannuolina by its bilaterally symmetrical mitral sclerites that bear two teeth, the absence of pores on the apical area of mitral sclerites, and the absence of a well-developed sella in sellate sclerites. |
Measurements
No measurements are available
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| Source: p = phylum, uc = unranked clade | |||||
| References: Nesnidal et al. 2013, Aberhan et al. 2004 | |||||
Age range: base of the Meishucunian to the top of the Botomian or 530.70000 to 512.10000 Ma
Collections (29 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Cambrian | Australia (South Australia) | M. etheridgei (215351 215352 215353 215354 242345) | |
| Meishucunian - Tommotian | China (Yunnan) | M. xiaofanensis (96302 96303) | |
| Atdabanian | Australia (South Australia) | M. etheridgei (49618 96454 97739 97740 97741 97742 97744 97746 97747 97748 97769 140339 155987 155989) | |
| Atdabanian | Russian Federation (Siberia) | Mirabella ridicula (10011) | |
| Atdabanian - Botomian | Australia (Northern Territory) | M. etheridgei (80920 80921) | |
| Botomian | Australia (South Australia) | M. etheridgei (96932 96958 97770) M. etheridgei, M. pusilla (96917 96959) |